Who Is the Greatest Adventurer of All Time?

Edmund Hillary, Edmund Shackleton, Marco Polo, and Neil Armstrong all accomplished feats that forever change humanity - breaking boundaries, redefining our limitations, and going where no one ever dared. But who was the greatest? We looked back at the feats of history's most prolific explorers on land, air, and ice, and picked our winners.

On Ice (Round 2)

Shackleton: Even at South Georgia Island, Shackleton still had to be first to cross the island's mountains, a 22-mile trek, to reach help. "If anything happens to me while those fellows are waiting for me, I shall feel like a murderer," he said. Peary, for his part, missed the North Pole by five miles.

Amundsen: He borrowed his mentor Nansen's ship Fram to be the first to the North Pole…but when he heard Peary beat him to it, he simply turned for the South Pole (not telling his crew for a month), even wiring ahead to warn rival Robert Scott: beg leave to inform you fram proceeding antarctic amundsen.